EP2248768A1 - Procédé de production d'eau potable par coagulation-floculation en utilisant un produit minéral contenant des argiles et des carbonates minéraux - Google Patents

Procédé de production d'eau potable par coagulation-floculation en utilisant un produit minéral contenant des argiles et des carbonates minéraux Download PDF

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Publication number
EP2248768A1
EP2248768A1 EP10004660A EP10004660A EP2248768A1 EP 2248768 A1 EP2248768 A1 EP 2248768A1 EP 10004660 A EP10004660 A EP 10004660A EP 10004660 A EP10004660 A EP 10004660A EP 2248768 A1 EP2248768 A1 EP 2248768A1
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EP
European Patent Office
Prior art keywords
water
treatment
production
human consumption
procedure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10004660A
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German (de)
English (en)
Other versions
EP2248768A8 (fr
EP2248768B1 (fr
Inventor
Cortes Jose Ignacio Tolosa
Lopez Miguel Angel Caballero
Ladrero Nuria Isabel Aguaviva
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Minera Catalano Aragonesa SA
Original Assignee
Minera Catalano Aragonesa SA
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Publication of EP2248768A1 publication Critical patent/EP2248768A1/fr
Publication of EP2248768A8 publication Critical patent/EP2248768A8/fr
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment

Definitions

  • the present invention falls within the field of the treatment of water intended for the production of water for human consumption. More specifically, it relates to a procedure for the treatment of water intended for the production of water for human consumption by means of coagulation-flocculation that uses a mineral product containing clays and mineral carbonates that is particularly useful in the technological improvement of said treatment processes.
  • Water purification is one of the fields that has undergone the greatest development over the past years. Increasingly restrictive legislation established by the different Administrations, along with a greater social awareness, has led to an increase in efforts to search for appropriate treatment and purification systems. The specific field of treatments intended for the production of water for human consumption is of particular importance.
  • the production of water for human consumption may comprise various processes depending on the nature of the impurities in each type of water to be treated. All of these treatments are well known within the sector, the most common processes being disinfecting, filtering, coagulation-flocculation and sedimentation.
  • Coagulation-flocculation processes seek to eliminate material held in suspension in the water to be treated, chiefly improving the turbidity of the water.
  • specific regulations relating to the use of substances for the treatment of water intended for the production of water for human consumption limiting the solutions to be adopted; hence amongst the authorized coagulants-flocculants are:
  • Clays have been proposed for use in water purification processes due to some of the properties that said materials present, such as their high porosity, their high specific surface area and their high capacity for cation exchange that confers on them their characteristic high absorption and adsorption capacity.
  • Clays have been studied both in their natural and modified form. Said modifications have been aimed at varying certain characteristics of the clays.
  • the treatment of clays with inorganic acids produces the cleaning of the material and an increase in porosity and the specific surface area.
  • An increase in porosity is also achieved by subjecting clays to thermal treatment.
  • the objective sought has been that of preparing specific products for specific problems.
  • treatment of clays with certain organic reagents endows them with water-repelling characteristics that are taken advantage of for the selective elimination of organic pollutants.
  • the subject matter of the present invention refers to a procedure for the treatment of water intended for the production of water for human consumption by means of coagulation-flocculation that uses a mineral product, the said mineral product containing clays and mineral carbonates.
  • a mineral product the said mineral product containing clays and mineral carbonates.
  • carbonates calcium carbonate, calcium carbonate coated with manganese dioxide, sodium carbonate and semi-calcined dolomite.
  • the procedure for the treatment of water intended for the production of water for human consumption by means of coagulation-flocculation, that is the subject matter of the invention, is disclosed, said procedure using a mineral product that contains clays and mineral carbonates, in proportions of between 45 and 95% in weight in clays and between 4 and 55% in weight in mineral carbonates, said mineral product being modified by means of a treatment selected between a thermal treatment at a temperature of between 20 and 1200°C, during a period of time of between 10 seconds and 24 hours, and/or a treatment with a chemical product selected between an inorganic acid, an organic acid, one or more salts of inorganic acids and one or more salts of organic acids.
  • the clays are selected between sepiolite, palygorskite, smectites, illite, and their mixtures, as useful mineral products in the treatment of water intended for the production of water for human consumption.
  • Both the clays and the mineral carbonates present in the mineral product that is the subject matter of the invention are an active part of the usefulness of the mineral product for the treatment of water intended for the production of water for human consumption.
  • the procedure that is the subject matter of the invention has the significant advantage of presenting an alternative production process that achieves better technical efficacy and a lower economic cost compared to known coagulants-flocculants commonly used in processes for the treatment of water intended for the production of water for human consumption.
  • Another important advantage of this procedure is the versatility of use of the mineral product since it can act either as a coagulant-flocculant or as a flocculation coadjuvant.
  • This procedure presents the added advantage of the low economic cost of the mineral product used, since it is a product that is easy to locate, it is commonly available, easy to transport and store and it does not decompose, it is non-toxic and it is clean.
  • the present invention refers to a procedure for the treatment of water intended for the production of water for human consumption by means of coagulation-flocculation, characterised by the use of a mineral product that contains:
  • the clays are selected between sepiolite, palygorskite, smectite, illite and their mixtures, in the following percentages: % (w/w) sepiolite and/or palygorskite 5-80 smectites 5-40 illite 0-30 in relation to the total weight of the composition.
  • the smectites are selected from the group formed by: montmorillonite, beidellite, hectorite, nontronite, saponite, sauconite, stevensite, and their mixtures.
  • the mineral carbonates that form part of the mineral product that is the subject matter of the invention are selected between calcite (CaCO 3 ), magnesite (MgCO 3 ), dolomite (CaMg(CO 3 ) 2 ) and their mixtures.
  • the mineral product used in the invention may optionally contain up to 20% (w/w) of other minerals selected from the group formed by: feldspars, plagioclases, mica, quartz, kaolinite, talc, chlorite, vermiculite, halloysite and their mixtures.
  • Mineral carbonates are minerals that are widely known. Calcium carbonate (CaCO 3 ; calcite or limestone), magnesium carbonate (MgCO 3 ; magnesite) and double calcium and magnesium carbonate (ideal formula CaMg(CO 3 ) 2 ; dolomite) particularly stand out for their historical importance and industrial applications.
  • Clays refers to a specific group of phyllosilicates.
  • the structure of these phyllosilicates is based on the stacking of layers of oxygen ions and hydroxyls.
  • the tetrahedral silicon can be partly replaced by Al 3+ or Fe 3+ .
  • These tetrahedral layers bind to other octahedral layers of the gibbsite or brucite type.
  • the bond plane between both layers if formed by the apical oxygens that are not shared by the SiO 4 4- tetrahedra and by the OH - groups of the octahedral layer.
  • the phyllosilicates may be formed by two layers, the tetrahedral plus octahedral layer, being known as 1:1 phyllosilicates, or by three layers, one octahedral and two tetrahedral layers, being known as 2:1 phyllosilicates.
  • the unit formed by the bonding of these two or three layers is known as a sheet. If all of the octahedral holes are occupied, the sheet is known as trioctahedral. If only two thirds of the positions are occupied and the rest are vacant, it is known as dioctahedral.
  • the serpentines-kandites group are 1:1 phyllosilicates. Just like 2:1 phyllosilicates they include the talc-pyrophyllite, smectite, vermiculite, illite, and mica and chlorite groups.
  • clays are the minerals of the hormite group, formed by minerals of the palygorskite-sepiolite family. Unlike the rest of the phyllosilicates, which are laminar, they are usually fibrous as the basal layer of oxygens is continuous, but the apical oxygens are inverted every six tetrahedra (sepiolite) or every four tetrahedra (palygorskite/attapulgite). This inversion causes channels to form in which large size molecules can be accommodated.
  • the mineral product used in the invention displays a mineralogical composition that contains between 45 and 95% of clays and between 4 and 55% of mineral carbonates.
  • Said clays are a mixture of sepiolite and/or palygorskite (between 5 and 80%), smectites (between 5 and 40%) and illite (between 0 and 30%).
  • the mineral product may have up to 20% of other minerals, which may be feldspars, plagioclases, mica, quartz, kaolinite, talc, chlorite, vermiculite, haloysite and their mixes. The percentages always refer to the total composition.
  • a deposit may be selectively mined, extracting a clayey rock that contains the ingredients that form part of the mineral product in the percentages indicated. Said clayey rock is extracted from the deposit with more than 30% moisture. It then undergoes the processes of stockpiling, crushing, drying and granulating, for which any of the systems customarily utilized in industry may be used.
  • Another aim of the invention is to obtain the mineral product described through a mixture of several components, each of which will contain one or several of the ingredients that form part of the mineral product. Said mixture may be carried out by means of the methods customarily utilized by industry, subsequently undergoing crushing, drying and granulating methods
  • the mineral product used in the invention is presented preferably as a granular porous product with a grain size of less than 5 mm, preferably less than 0.6 mm, preferably less than 150 ⁇ m, preferably less than 10 ⁇ m.
  • the subject matter of the invention is also considered to be a procedure for the treatment of water that uses a mineral product that is the result of the modification of the mineral product that is the subject matter of the present invention, by any of said treatments.
  • the present invention also covers a procedure for the treatment of water that uses a mineral product such as that previously defined that is modified by a thermal treatment process.
  • Said thermal treatment process takes place at a temperature of between 20 and 1200°C during a period of time of between 10 seconds and 24 hours.
  • the mineral product can undergo a granulation process to achieve the previously indicated required grain size.
  • the present invention also covers a procedure for the treatment of water that uses a mineral product that contains clays and mineral carbonates such as that previously defined that is modified by a treatment process with organic and/or inorganic chemical products.
  • said modification is carried out by the treatment of the mineral product with organic and/or inorganic acids and their salts.
  • Also considered as the subject matter of the invention is the use of the mineral products described in water treatment processes intended for the production of water for human consumption in combination with bactericidal agents, descaling agents, pH correctors, coagulants-flocculants, bleaching agents and their mixtures.
  • the mineral product can be added either in its solid form or in the form of a suspension.
  • Said suspension can be obtained by mixing the mineral product that is the subject matter of the invention with potable water or water to be treated.
  • the amount of mineral product to be used is between 0.05mg/l and 50,000 mg/l, preferably between 0.1 mg/l and 20,000 mg/l, preferably between 0.5 mg/l and 1,000 mg/l, and most preferably between 1 mg/l and 200 mg/l, always in dry matter, in relation to a litre of water to be treated, intended for the production of water for human consumption.
  • the addition of the mineral product that is the subject matter of the invention is carried out at the coagulation-flocculation stage, either in one step or several consecutive steps.
  • Evaluation of the utility of the mineral product used in the procedure for the treatment of water intended for the production of water for human consumption that is the subject matter of the invention is based on the measurement of turbidity in NTUs.
  • EXAMPLE 1 The example illustrates the results of different tests on treating water intended for human consumption in a coagulation-flocculation process.
  • the water without any type of treatment had a turbidity of 28.80 NTU and a pH of 7.75.
  • the example illustrates how the product used in the procedure that is the subject matter of the invention (which in the tables is given the name AD) is capable of obtaining good results in combination with aluminium polychloride, avoiding the use of poly diallyl-dimethyl-ammonium and polyacrylamides.
  • the use of the legally established amount of polyacrylamide shows that its effectiveness is totally comparable to the use of poly diallyl-dimethyl-ammonium.
  • EXAMPLE 2 The example illustrates the results of the different tests on the treatment water intended for human consumption in a coagulation-flocculation process.
  • the water without any type of treatment had a turbidity of 25.07 NTU and a pH of 7.54.
  • the example illustrates how, in this case, the addition of a second coagulant-flocculant (either poly diallyl-dimethyl-ammonium or the product that is the subject matter of the invention (AD)) improves the efficacy of the process. Between both products the product that is the subject matter of the invention is observed to have a greater efficacy. Only 20 ppm are required compared to the 50 ppm of poly diallyl-dimethyl-ammonium needed.
  • a second coagulant-flocculant either poly diallyl-dimethyl-ammonium or the product that is the subject matter of the invention (AD)
  • EXAMPLE 3 The example illustrates the results of different tests on the treatment of water intended for human consumption in a coagulation-flocculation process.
  • the water without any type of treatment had a turbidity of 42 NTU and a pH of 8.14.
  • the example illustrates the efficacy of aluminium polychloride and the AD product that is the subject matter of the invention as the only coagulants-flocculants. It can be observed that with 0.1 ppm of AD we obtain a result that is comparable to the addition of 20 ppm of aluminium polychloride. The use of both products together slightly improves the result obtained.
EP20100004660 2009-05-05 2010-05-03 Utilisation d'un produit minéral contenant des argiles et des carbonates minéraux comme un agent coagulant floculant-pour la production d'eau potable Active EP2248768B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200930130A ES2349603B1 (es) 2009-05-05 2009-05-05 Producto mineral para el tratamiento del agua destinada a la produccion de agua de consumo humano y uso.

Publications (3)

Publication Number Publication Date
EP2248768A1 true EP2248768A1 (fr) 2010-11-10
EP2248768A8 EP2248768A8 (fr) 2010-12-22
EP2248768B1 EP2248768B1 (fr) 2013-07-24

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EP (1) EP2248768B1 (fr)
ES (2) ES2349603B1 (fr)
PT (1) PT2248768E (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103408096A (zh) * 2013-08-23 2013-11-27 连仲勋 一种含有坡缕石的净水剂及其制备方法
WO2015055866A1 (fr) * 2013-10-20 2015-04-23 Tecambyot Slu Membranes céramiques et dispositif de traitement de fluides

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8753531B1 (en) * 2011-03-31 2014-06-17 David Schneider Product and method for enhancing the biophysical effects of water
MX359746B (es) 2012-07-03 2018-10-08 Veolia Water Solutions & Tech Proceso de purificacion de una solucion de agua contaminada con metaloide para reduccion de concentracion de contaminante calificada como segura para el consumo humano en la misma, por precipitacion sin oxidacion.
CN110127805B (zh) * 2019-06-18 2020-05-19 江苏永威环境科技股份有限公司 一种污水的处理方法

Citations (16)

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Publication number Priority date Publication date Assignee Title
US4116828A (en) 1975-11-28 1978-09-26 International Telephone And Telegraph Corp. Water purification methods
GB2200350A (en) 1987-01-29 1988-08-03 Le I Inzhenerov Zheleznodorozh Process for producing granulated filter material for water purification
JPH02198691A (ja) 1989-01-30 1990-08-07 Yoshiharu Iino 飲料水の高度濾過剤
US5154834A (en) 1991-03-11 1992-10-13 Infilco Degremont Inc. Disinfection by-products removal in water purification
US5198114A (en) 1989-02-06 1993-03-30 Lewis David L Dolomitic activated carbon filter
JPH07178389A (ja) 1993-12-24 1995-07-18 Kurita Water Ind Ltd 飲用水製造装置及び飲用水生成器
WO1995026932A1 (fr) 1994-04-05 1995-10-12 Metz Jean Paul Compositions et procedes nouveaux pour le traitement des eaux
GB2364047A (en) 2000-06-27 2002-01-16 Procter & Gamble Water treatment composition
RU2182562C2 (ru) 2000-06-07 2002-05-20 Государственный научный центр Российской Федерации Институт медико-биологических проблем Способ получения биологически активной питьевой воды с пониженным содержанием дейтерия и устройство для ее получения
US6461535B1 (en) * 1999-12-03 2002-10-08 Pan American Health Organization Composition for arsenic removal from ground water
RU2210425C1 (ru) 2002-01-08 2003-08-20 Общество с ограниченной ответственностью Научно-производственное объединение "Агротех" Способ получения флокулирующего реагента для обработки жидких сред
EP1533275A1 (fr) * 2003-11-20 2005-05-25 S.A. Minera Catalano-Aragonesa Composition d'argile et de dolomite pour le traitement des eaux
WO2006068496A1 (fr) 2004-12-21 2006-06-29 Health By Nature As Agent et procede destines a l’amelioration de l’eau et d'autres liquides potables
EP1749798A1 (fr) * 2005-07-28 2007-02-07 Sociedad Anonima Minera Catalano-Aragonesa Produit minéral pour l'amélioration technologique des traitements biologiques aérobies et utilisation correspondante
EP1953119A1 (fr) * 2007-02-01 2008-08-06 Unilever N.V. Composition de purification de l'eau
EP1980538A1 (fr) * 2007-03-28 2008-10-15 Unilever N.V. Système de purification d'eau

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US4765908A (en) * 1985-02-04 1988-08-23 Barbara Monick Process and composition for removing contaminants from wastewater

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4116828A (en) 1975-11-28 1978-09-26 International Telephone And Telegraph Corp. Water purification methods
GB2200350A (en) 1987-01-29 1988-08-03 Le I Inzhenerov Zheleznodorozh Process for producing granulated filter material for water purification
JPH02198691A (ja) 1989-01-30 1990-08-07 Yoshiharu Iino 飲料水の高度濾過剤
US5198114A (en) 1989-02-06 1993-03-30 Lewis David L Dolomitic activated carbon filter
US5154834A (en) 1991-03-11 1992-10-13 Infilco Degremont Inc. Disinfection by-products removal in water purification
JPH07178389A (ja) 1993-12-24 1995-07-18 Kurita Water Ind Ltd 飲用水製造装置及び飲用水生成器
WO1995026932A1 (fr) 1994-04-05 1995-10-12 Metz Jean Paul Compositions et procedes nouveaux pour le traitement des eaux
US6461535B1 (en) * 1999-12-03 2002-10-08 Pan American Health Organization Composition for arsenic removal from ground water
RU2182562C2 (ru) 2000-06-07 2002-05-20 Государственный научный центр Российской Федерации Институт медико-биологических проблем Способ получения биологически активной питьевой воды с пониженным содержанием дейтерия и устройство для ее получения
GB2364047A (en) 2000-06-27 2002-01-16 Procter & Gamble Water treatment composition
RU2210425C1 (ru) 2002-01-08 2003-08-20 Общество с ограниченной ответственностью Научно-производственное объединение "Агротех" Способ получения флокулирующего реагента для обработки жидких сред
EP1533275A1 (fr) * 2003-11-20 2005-05-25 S.A. Minera Catalano-Aragonesa Composition d'argile et de dolomite pour le traitement des eaux
WO2006068496A1 (fr) 2004-12-21 2006-06-29 Health By Nature As Agent et procede destines a l’amelioration de l’eau et d'autres liquides potables
EP1749798A1 (fr) * 2005-07-28 2007-02-07 Sociedad Anonima Minera Catalano-Aragonesa Produit minéral pour l'amélioration technologique des traitements biologiques aérobies et utilisation correspondante
EP1953119A1 (fr) * 2007-02-01 2008-08-06 Unilever N.V. Composition de purification de l'eau
EP1980538A1 (fr) * 2007-03-28 2008-10-15 Unilever N.V. Système de purification d'eau

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103408096A (zh) * 2013-08-23 2013-11-27 连仲勋 一种含有坡缕石的净水剂及其制备方法
WO2015055866A1 (fr) * 2013-10-20 2015-04-23 Tecambyot Slu Membranes céramiques et dispositif de traitement de fluides

Also Published As

Publication number Publication date
ES2349603A1 (es) 2011-01-07
EP2248768A8 (fr) 2010-12-22
EP2248768B1 (fr) 2013-07-24
PT2248768E (pt) 2013-10-03
ES2349603B1 (es) 2011-10-28
ES2430347T3 (es) 2013-11-20

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